When you change your Facebook password, it doesn't take 14 days for the change to go into effect. Even if Facebook does need some time to really delete all of your information from all shards, datacenters, whatever - the least they can do is immediately restrict access to your account. After all, that is exactly what you are asking for.
BUT as if by magic, if you log in within these 14 days, everything will be restored as if nothing happened, and they'll forgive you.
I can't figure out if this is a really bad case of eventual consistency or just a cooling off period they hope to entice you back with.